I love how Google Trends presents the popularity of a specific query by location. For example, my product may be more popular or more "searched" in a specific state or city. This helps a lot for direct mail campaigns or any sort of in-person marketing efforts like events or pop-ups. You could use the information from Google Trends to decide what locations will be more receptive of your product/industry or you could see where people have little to no interest and build a brand awareness campaign focusing on those areas.
Another great feature within Google Trends is that it shows "Related Queries", which are basically suggestions of better keywords or phrases to incorporate into your content. If you search for data on a keyword you're using that's too broad (your content won't stand out among other web pages) or too narrow (not many potential customers are searching that keyword or phrase), Google Trends will suggest a related keyword or phrase that is more appropriate or trending at the moment. You could go back and incorporate these phrases into your content so that it's more likely to be found on search engines.
Within the Google Trends "Related Topics" section, you can choose whether you want to see topics that are "Top" or "Rising". I like this feature because looking at a "Rising" topic can help you create content that's more likely to be seen - especially if you're a beginner. Most topics that are in the "Top" category can have thousands of web pages that you're competing against and you can feel like your content is drowning. But the topics in the "rising" category can be great for newer sites that haven't developed authority online yet. You can write on one of these topics and be one of the first sites to create content on that topic, which gives you a head start over other sites.
Google Trends "Categories" is also a great feature. If you don't have any content ideas for your website, you can easily find inspiration by selecting a category that's relevant to your industry. The top keywords or topics will come up and you can create content on those topics to increase your number of web visitors. For example, if you work in the fashion industry and you don't have content ideas, you can have Google Trends generate data for the "Beauty & Fitness" or "Shopping" categories to see what's trending. Google will tell you if a specific brand, person, or event is trending and you could write an article based on one of those trends. Since people are searching for that topic, your content will be seen. This is a great way to create timely content even if you're new to an industry or simply haven't kept up with it.